The past perfect continuous tense is also known as the past perfect progressive tense. It describes an action that had started in the past and was continuing during a time in the past.
subject + had + been + v1(ing)
AFFIRMATIVE FORM
Example:
I had been studying.
I had been writing a letter.
You had been drawing a sketch of a map.
We had been practicing a dance.
We had been cleaning the house.
They had been running in the morning.
She had been dancing well yesterday.
Kate and I had been playing games.
The director had been blaming them.
It had been eating.
Time's up
NEGATIVE FORM
subject + had + not + been + v1(ing)
Example:
I had not been writing the letter/ I hadn’t been writing the letter.
You had not been playing cricket / You hadn’t been playing cricket.
We had not been completing the task / We hadn’t been completing the task.
She had not been studying/ She hadn’t been studying.
The teacher had not been explaining the lesson / The teacher hadn’t been explaining the lesson.